Once a functioning blast furnace, Sloss is said to be haunted by the spirits of the laborers who died there. These days, Sloss Furnace is a national landmark and modern metallurgy handicraft center. Its industrial aesthetic make it a perfect location for spooky corporate events and parties.

According to Wikipedia, “the Coral Gables Biltmore is reportedly haunted by the ghost of Thomas ‘Fatty’ Walsh, a mobster who was murdered there on September 7, 1929 during a gambling dispute. Claims include that his ghost haunts the hotel elevator. Claims also include that of a woman who was said to have jumped out of a window to save her child and a woman in white clothing in their rooms.” The Biltmore has dozens of event venue spaces, from 3,744-square foot areas (with capacity for 300-500, depending on space usage) to much smaller areas for more intimate occasions or break-out sessions.

Redstone Castle, a gorgeous Tudor-style mansion built in the late 1800’s, is rumored to be haunted by the ghost of John Osgood, the castle’s builder and a famous American coal magnate. The curator of the grounds has spoken of “ghostly cigar smoke” in the passageways, and manor guests have reported strange incidents. Redstone is currently undergoing renovations, but sign up for their mailing list to be the first in the know when they re-open for events.

Fort Delaware, a Civil-War era detention facility for Confederate prisoners and federal detainees, is said to be haunted by imprisoned Confederate soldiers who died there. Managed by Delaware State Parks, the location hosts several yearly outdoor activities and festivals, including paranormal ghost tours.